Chip-breaking machine for wood-pulp.



No. 629,262. Pal tented July IS, 11399..

' A. 0. LDMBARD.

GHlP BREAKING MACHINE FBR WOOD PULP.

(Application filed. Apr. 2'2,v 1898.)

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an. 629,262. I Patented July l8, was. 1 A. o. LOMBARD.

CHIP BREAKING MACHINE FUR WOOD PULP.

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UNITED STATES ATENT OFFICE.

. ALVINO. LOMBARD', on WATERVILLE, MAINE.

CHIP-BREAKIN MAC IN FOR wooo-PpLP.

'SIEC IFICATION forming part of Letters Patent No.629,262, dated July 18, 1899.

Application filed April 27, 1898.

Serial No. 679,014. (No model.)

To all whom/it may concern/.- I

and useful Improvements in Chip-Breaking Machines for Wood-Pulp, of which the following is a full, clear, and exact description. This invention relates to a machine for breaking up small blocks of wood into chips,

&c., or into a suitable condition formaking wood-pulp fromvwhich to make paper; and the invention consists in combination, with a rotating drum having one or more series of radially-projecting arms pivoted thereto, of a suitable receptacle to receive the blocks of wood to be broken, provided with obstructions or projections against which the blocks of wood are forced by the arms striking them as the drum "is swiftly rotated, whereby the blocks of wood are: broken up into chips or small particles suitable to be put into a machine for beating the same into pulp for making paper, all substantially asjhereinafter fully described, reference being had to the accompanying sheets of drawings, in which. is shown a machine constructed and arranged for operation in accordance with this invention. Figure 1 isa plan view. Fig. 2 is an end elevation; and Fig. 3 is a verticalcross-section online33,Fig,1. a

In the drawings, A represents a horizontal shaft-adapted to turn in bearings B, supported on a frame 0, which shaft on one end has a pulley D, by which it can be connected by a belt with any suitable driving power- Secured to this shaft between the end pieces E of the frame is a drum F,to rotate with the shaft having four longitudinal series or rows of transverse grooves or recesses G in the circumference, two seriesH J being diametrically opposite to each other on the same turns verse plane, and the other series K L being diametrically opposite to each other, but on a transverse plane at one side of or alternating with the first series. .Pivoted in each groove is'an armM of a length to project beyond the circumference of the drum, the arms pivoted in the two series of grooves K L being of equal length, but longer than the other two series of arms, which are of equal length and pivoted in'the two series of grooves H J,

as shown more particularly in cross-section in Fig. 3.

r N is an upright board or piece in front of the drum F, secured to the plate P by bolts a, which plate is secured to theends O of the frame by bolts I), this board being substantially vertical, but of the outline shown in cross-section in Fig. 3, and forming in connectionwith the drum between it and the drum and its end walls d a receptacle Q, into which the suitablyprepared blocks of wood are placed to be broken up into chip form by the arms of the drum as they are carried around with the drum. Secured at regular intervals along this front board N on its inner side are two rows of knuckle-like projections R S, extending toward the drum, one row, R, above the other row, S, and in the same transverse vertical planes, and'each of a thickness correspondingto the thickness of the arms M. These projections are in the-same transverse vertical planes as the shorter arms T, but are of such a length that the ends 9 of the shorter arms,-as the drum is rotated, will freely pass by the ends f of the projections and not touch them, while the longer arms U not being in v the same transverse planes as the shorter arms in the rotation of the drum their ends a will freely pass between the projections R and S.

The operation of the machine is substantiallyas follows: The drum F is rotated at a rapid speed, the centrifugal force causing the arms M to project radially from the drum, as shown in Fig. 2. The'blocks of wood which have previously been prepared of the proper shape and length are then thrown into the receptacle between the drum and the .front board and fall down upon theknuckle' projections Rof the upper series, when they are struck forcibly by the longer arms U of the drum as they rest on these projections. The blocks thus broken then fall down upon the lower row of projections S, against which they are forced by the arms, again striking them and broken still more when they fall down through the opening Vat the bottom into a suitable receptacle for removing them to the pulp-machine. "also strike against the blocks or chips and still further reduce them to smaller particles by forcing them agaiustthe knuckle projec- The shorter arms T of the drum-one set in the same vertical plane e ceases:

tions and grinding them between their respective ends.

This machine breaks the block very rapidly, easily, and satisfactorily into the small chips necessary for making pulp of the same.

The grooves or recesses in the drum are.

widened at their outer ends, as shown in Fig 3, which allows more freedom of the arms, so that they will not be-too rigid.

Having thus described my invention, what I claim is--.-

1. In a chip-breaking machine, the combination of a rotary drum, a series of arms pivotally mounted thereon with the alternate opposite arms in different vertical planes and of difiierent length, the free ends of all of said arms projecting beyond the periphery of the drum a-nd rigid projections infront as the shorter, arms and out of the plane of the other setof arms, as and for the purpose specified, v

2. In a chip-breaking machine, the combi nation of a rotary drnm, a series of arms pivot'ally mounted therein with alternate opp0- site arms of less length and in different vertical planes from the, other arms, the free ends of all the arms projecting beyond the periphery of the drum, and rigid projections in front of the drum with one set above the horizontal axis of the drum and out of Vertical plane with the longer arms, and the other set below said axial line and in vertical plane with the shorter arms, as set forth.

3. In a chip-breaking machine, in combination, a rotating drum, a longitudinal row or series of transverse grooves or. recesses in the circumference of the drum, an arm piv oted in each groove or recess their free ends projecting beyond the circumference of the drum and a series of rigid projections on a suitable support in front of the drum in the,

same transverse vertical planes of the arms respectively. a

In testimony whereof I have hereunto set my hand in the presence of 'twosu'bscribing witnesses.

.Atyin o. LOMBARD.

Witnesses: I

HQRACE PRINCETON,- FRANK W; I'IASKELL. 

